{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:AJPCQTPNXUVELB5ZP45W6S2KGR","short_pith_number":"pith:AJPCQTPN","canonical_record":{"source":{"id":"1601.04841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2016-01-19T09:41:02Z","cross_cats_sorted":[],"title_canon_sha256":"b235b51d2cdde8de010d7d8055a5910b152e7bbcb421a9d454b27aae758560fc","abstract_canon_sha256":"1f989b79b5f8d1e398aaa30e3ff146ffd1a4e7da3882128f824835e0104f4281"},"schema_version":"1.0"},"canonical_sha256":"025e284dedbd2a4587b97f3b6f4b4a347ab4e697e77dcda39cdb565c8cb8dc84","source":{"kind":"arxiv","id":"1601.04841","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.04841","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"arxiv_version","alias_value":"1601.04841v1","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.04841","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"pith_short_12","alias_value":"AJPCQTPNXUVE","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"AJPCQTPNXUVELB5Z","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"AJPCQTPN","created_at":"2026-05-18T12:30:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:AJPCQTPNXUVELB5ZP45W6S2KGR","target":"record","payload":{"canonical_record":{"source":{"id":"1601.04841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2016-01-19T09:41:02Z","cross_cats_sorted":[],"title_canon_sha256":"b235b51d2cdde8de010d7d8055a5910b152e7bbcb421a9d454b27aae758560fc","abstract_canon_sha256":"1f989b79b5f8d1e398aaa30e3ff146ffd1a4e7da3882128f824835e0104f4281"},"schema_version":"1.0"},"canonical_sha256":"025e284dedbd2a4587b97f3b6f4b4a347ab4e697e77dcda39cdb565c8cb8dc84","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:31.729677Z","signature_b64":"qNdV1J+iuYP4kP+6xBYfoaQIL9thTTtimb4qtl0iOjkyTcavhOT+FptVOsptkX3S7X3msLnyUWHu8xQllVlYCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"025e284dedbd2a4587b97f3b6f4b4a347ab4e697e77dcda39cdb565c8cb8dc84","last_reissued_at":"2026-05-18T01:22:31.729113Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:31.729113Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.04841","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qrghymvNtufov2BRQU9rer9IG1c3FylYvDYaM4eYCacq4ry9BeEWy0/hvP0sC8auhDBh4ZObM08Jhxr2k9BpAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:52:29.487753Z"},"content_sha256":"bff1b83dca99a262bb82346c57e168da7c04438c874c59b052452f402a190fa8","schema_version":"1.0","event_id":"sha256:bff1b83dca99a262bb82346c57e168da7c04438c874c59b052452f402a190fa8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:AJPCQTPNXUVELB5ZP45W6S2KGR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Vital variables and survival processes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.ME","authors_text":"Peter McCullagh, Walter Dempsey","submitted_at":"2016-01-19T09:41:02Z","abstract_excerpt":"The focus of a survival study is partly on the distribution of survival times, and partly on the health or quality of life of patients while they live. Health varies over time, and survival is the most basic aspect of health, so the two aspects are closely intertwined. Depending on the nature of the study, a range of variables may be measured; some constant in time, others not; some regarded as responses, others as explanatory risk factors; some directly and personally health-related, others less directly so. This paper begins by classifying variables that may arise in such a setting, emphasiz"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.04841","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2J2cqzdb6y8zWojWC2uf8/cNcWb+5UEFCqlaH3GC5La3KEKJ7cVyrSQSTTbsKHQS4nHD9ViJaXW1kH9SE3KwAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:52:29.488412Z"},"content_sha256":"aa1b2dc13803f959b5367a354ad7579fc03091bc29cf2120919e0477a405b4fa","schema_version":"1.0","event_id":"sha256:aa1b2dc13803f959b5367a354ad7579fc03091bc29cf2120919e0477a405b4fa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AJPCQTPNXUVELB5ZP45W6S2KGR/bundle.json","state_url":"https://pith.science/pith/AJPCQTPNXUVELB5ZP45W6S2KGR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AJPCQTPNXUVELB5ZP45W6S2KGR/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T21:52:29Z","links":{"resolver":"https://pith.science/pith/AJPCQTPNXUVELB5ZP45W6S2KGR","bundle":"https://pith.science/pith/AJPCQTPNXUVELB5ZP45W6S2KGR/bundle.json","state":"https://pith.science/pith/AJPCQTPNXUVELB5ZP45W6S2KGR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AJPCQTPNXUVELB5ZP45W6S2KGR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:AJPCQTPNXUVELB5ZP45W6S2KGR","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"1f989b79b5f8d1e398aaa30e3ff146ffd1a4e7da3882128f824835e0104f4281","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2016-01-19T09:41:02Z","title_canon_sha256":"b235b51d2cdde8de010d7d8055a5910b152e7bbcb421a9d454b27aae758560fc"},"schema_version":"1.0","source":{"id":"1601.04841","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.04841","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"arxiv_version","alias_value":"1601.04841v1","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.04841","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"pith_short_12","alias_value":"AJPCQTPNXUVE","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"AJPCQTPNXUVELB5Z","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"AJPCQTPN","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:aa1b2dc13803f959b5367a354ad7579fc03091bc29cf2120919e0477a405b4fa","target":"graph","created_at":"2026-05-18T01:22:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The focus of a survival study is partly on the distribution of survival times, and partly on the health or quality of life of patients while they live. Health varies over time, and survival is the most basic aspect of health, so the two aspects are closely intertwined. Depending on the nature of the study, a range of variables may be measured; some constant in time, others not; some regarded as responses, others as explanatory risk factors; some directly and personally health-related, others less directly so. This paper begins by classifying variables that may arise in such a setting, emphasiz","authors_text":"Peter McCullagh, Walter Dempsey","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2016-01-19T09:41:02Z","title":"Vital variables and survival processes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.04841","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:bff1b83dca99a262bb82346c57e168da7c04438c874c59b052452f402a190fa8","target":"record","created_at":"2026-05-18T01:22:31Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"1f989b79b5f8d1e398aaa30e3ff146ffd1a4e7da3882128f824835e0104f4281","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2016-01-19T09:41:02Z","title_canon_sha256":"b235b51d2cdde8de010d7d8055a5910b152e7bbcb421a9d454b27aae758560fc"},"schema_version":"1.0","source":{"id":"1601.04841","kind":"arxiv","version":1}},"canonical_sha256":"025e284dedbd2a4587b97f3b6f4b4a347ab4e697e77dcda39cdb565c8cb8dc84","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"025e284dedbd2a4587b97f3b6f4b4a347ab4e697e77dcda39cdb565c8cb8dc84","first_computed_at":"2026-05-18T01:22:31.729113Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:31.729113Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qNdV1J+iuYP4kP+6xBYfoaQIL9thTTtimb4qtl0iOjkyTcavhOT+FptVOsptkX3S7X3msLnyUWHu8xQllVlYCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:31.729677Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.04841","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bff1b83dca99a262bb82346c57e168da7c04438c874c59b052452f402a190fa8","sha256:aa1b2dc13803f959b5367a354ad7579fc03091bc29cf2120919e0477a405b4fa"],"state_sha256":"a680c58e28c95f3ecf753dc1197511b83ecf07ff8cf07f537551ec80594bd780"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0hMp5EM0cwPhrxUpxsuz+t4i5mxQ59ubUyxFzl/LoEsGXHvvsW/Rx9wHI2XDKsbCVWt2MEre+qrVepSKxCLtAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:52:29.491800Z","bundle_sha256":"aa3a7f77cc03c1bfa99789d913f8a1d02d9acf21a686fa30855fa0293fa37cb2"}}